// out: ../css/inner.css, compress: true, sourceMap: false
@lightBlue: rgba(4, 10, 83, 0.86);
body {
  position: relative;
  margin: 0;
  overflow: hidden;
  background: url(../objs/innerball.jpg) center / cover no-repeat;
  font-family: '微软雅黑';
}

.left-back {
  display: flex;
  align-items: center;
  justify-content: center;
  position: fixed;
  width: 45px;
  height: 100vh;
  .back-btn {
    display: block;
    padding: 60px 5px;
    text-decoration: none;
    writing-mode: vertical-lr;
    font-size: 20px;
    color: #fff;
    background: @lightBlue;
  }
}